Initial reimplementation of MenuModel

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8887 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Refactor to Menuitem

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8888 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fix case

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8890 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fixed duplicate import

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8891 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
removed unused style

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8892 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c